Characteristics of Leaf 3. Photosynthesis occurs primarily in the mesophyll, which is the middle layer of a leaf. Importance. epidermis - the protective, outler layer of cells on the surface of a leaf. A leaf cell is a plant cell. Notably the presence of a more rigid cell wall and the modification to photosynthesize which requires chloroplast. Parts 4. The guard cells (and stoma) are part of the epidermis. The stomata close in the night to retain gases and moisture in the leaf cells and opens during the day for gaseous exchange to continue. In What Part of a Leaf Does Most Photosynthesis Occur? Learn vocabulary, terms, and more with flashcards, games, and other study tools. In addition to their role as the digestive component and organelle-recycling facility of animal cells, lysosomes are considered to be parts of the endomembrane system. guard cell - one of a pair of sausage-shaped cells that surround a stoma (a pore in a leaf). protect the leaf against h20 loss, injury + disease: Cuticle: wax, protective covering/prevents h2o loss: waxy part: Stomates: openings in the lower epidermis, allow exchange of gases between external + internal environment: Guard Cells Epidermis – The leaf's outer layer and protective "skin" surrounding leaf tissues. The whole leaf looks green to us, but most of the cells and cell material are colorless or clear. Take a good look at the diagram and the various parts of the leaf … The leaf blade is composed of tissue layers, each having an important part to play in a functioning leaf. By Staff Writer Last Updated Mar 31, 2020 1:06:27 AM ET. All plant cells have a cell wall and a cell membrane. The green color comes from the chlorphyll molecules in the chloroplasts. Types 5. Start studying Parts of leaf cell. The unique plant cell has similar parts and functions to an animal cell but a few distinct differences. Find these structures on the attached diagram of cellular leaf tissues. Definition of Leaf 2. Plant cell parts each have their own function, from the cell wall to the chloroplast. Except for the thylakoid membranes , where the clorophyll molecules reside, the rest of my colors are just there to help you see the parts, and to make pretty pictures. Lysosomes also use their hydrolytic enzymes to destroy pathogens (disease-causing organisms) that might enter the cell. The surface of many leaves is coated with a waxy cuticle which is secreted by the epidermis. The mesophyll contains cells called chloroplasts, which convert sunlight into a stable chemical energy source the plant can utilize. Modification 6. 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